One size fits all 3 8uk with these super soft luxury slipper boots, simply pop in the microwave for 90 seconds, and the french lavender infused wheat will heat up, ready for you sink your feet into to enjoy the soothing heat and fragrance'. '.strtoupper('i')f you don't have a microwave, you could sit them on a radiator, or put in the warming draw of your oven'! '.strtoupper('a')nd not just for heat, they can be placed in the freezer for cooling relief too'. '.strtoupper('t')hese booties aren't designed for walking around in, they are designed for snuggling down into a comfortable chair and keeping your feet toasty warm'. '.strtoupper('s')ee also the matching microwavable heated bottle simply warm for 90 seconds up to a 1,000w microwave.soothes, warms and comforts.scented with french lavender.chill in a freezer for cooling relief.suitable for all ages.surface clean regularly with a lightly damp cloth, allow to dry at room temperature'. '.strtoupper('d')o not immerse in water.dimensions one size sizes 3 8 uk